Issue #19407: fix link
diff --git a/Doc/installing/index.rst b/Doc/installing/index.rst
index e9370e0..a3beb3b 100644
--- a/Doc/installing/index.rst
+++ b/Doc/installing/index.rst
@@ -49,7 +49,7 @@
developers and documentation authors responsible for the maintenance and
evolution of the standard packaging tools and the associated metadata and
file format standards. They maintain a variety of tools, documentation
- and issue trackers on both `GitHub <https://github.com/pypa>` and
+ and issue trackers on both `GitHub <https://github.com/pypa>`__ and
`BitBucket <https://bitbucket.org/pypa/>`__.
* ``distutils`` is the original build and distribution system first added to
the Python standard library in 1998. While direct use of ``distutils`` is